package com.itboye.sunsun.utils;

import android.content.Context;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.style.ImageSpan;

//import com.android.mms.R;


import java.util.HashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import com.itboye.sunsunhome.R;

/**
 * A class for annotating a CharSequence with spans to convert textual emoticons
 * to graphical ones.
 */
public class SmilyParser {
    // Singleton stuff

    private static SmilyParser sInstance;
    public static SmilyParser getInstance() { return sInstance; }
    public static void init(Context context) {
        sInstance = new SmilyParser(context);
    }

    private final Context mContext;
    private final String[] mSmileyTexts;
    private final Pattern mPattern;
    private final HashMap<String, Integer> mSmileyToRes;

    public SmilyParser(Context context) {
        mContext = context;
        mSmileyTexts = mContext.getResources().getStringArray(DEFAULT_SMILEY_TEXTS);
        mSmileyToRes = buildSmileyToRes();
        mPattern = buildPattern();
    }

    static class Smileys {
        private static final int[] sIconIds = {
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000,
            R.drawable.f000
        };

        public static int HAPPY = 0;
        public static int SAD = 1;
        public static int WINKING = 2;
        public static int TONGUE_STICKING_OUT = 3;
        public static int SURPRISED = 4;
        public static int KISSING = 5;
        public static int YELLING = 6;
        public static int COOL = 7;
        public static int MONEY_MOUTH = 8;
        public static int FOOT_IN_MOUTH = 9;
        public static int EMBARRASSED = 10;
        public static int ANGEL = 11;
        public static int UNDECIDED = 12;
        public static int CRYING = 13;
        public static int LIPS_ARE_SEALED = 14;
        public static int LAUGHING = 15;
        public static int WTF = 16;

        public static int getSmileyResource(int which) {
            return sIconIds[which];
        }
    }

    // NOTE: if you change anything about this array, you must make the corresponding change

    // to the string arrays: default_smiley_texts and default_smiley_names in res/values/arrays.xml

    public static final int[] DEFAULT_SMILEY_RES_IDS = {
        Smileys.getSmileyResource(Smileys.HAPPY), // 0

        Smileys.getSmileyResource(Smileys.SAD), // 1

        Smileys.getSmileyResource(Smileys.WINKING), // 2

        Smileys.getSmileyResource(Smileys.TONGUE_STICKING_OUT), // 3

        Smileys.getSmileyResource(Smileys.SURPRISED), // 4

        Smileys.getSmileyResource(Smileys.KISSING), // 5

        Smileys.getSmileyResource(Smileys.YELLING), // 6

        Smileys.getSmileyResource(Smileys.COOL), // 7

        Smileys.getSmileyResource(Smileys.MONEY_MOUTH), // 8

        Smileys.getSmileyResource(Smileys.FOOT_IN_MOUTH), // 9

        Smileys.getSmileyResource(Smileys.EMBARRASSED), // 10

        Smileys.getSmileyResource(Smileys.ANGEL), // 11

        Smileys.getSmileyResource(Smileys.UNDECIDED), // 12

        Smileys.getSmileyResource(Smileys.CRYING), // 13

        Smileys.getSmileyResource(Smileys.LIPS_ARE_SEALED), // 14

        Smileys.getSmileyResource(Smileys.LAUGHING), // 15

        Smileys.getSmileyResource(Smileys.WTF), // 16

    };

    public static final int DEFAULT_SMILEY_TEXTS = R.array.default_smiley_texts;
    public static final int DEFAULT_SMILEY_NAMES = R.array.default_smiley_names;

    /**
     * Builds the hashtable we use for mapping the string version
     * of a smiley (e.g. ":-)") to a resource ID for the icon version.
     */
    private HashMap<String, Integer> buildSmileyToRes() {
        if (DEFAULT_SMILEY_RES_IDS.length != mSmileyTexts.length) {
            // Throw an exception if someone updated DEFAULT_SMILEY_RES_IDS

            // and failed to update arrays.xml

            throw new IllegalStateException("Smiley resource ID/text mismatch");
        }

        HashMap<String, Integer> smileyToRes =
                            new HashMap<String, Integer>(mSmileyTexts.length);
        for (int i = 0; i < mSmileyTexts.length; i++) {
            smileyToRes.put(mSmileyTexts[i], DEFAULT_SMILEY_RES_IDS[i]);
        }

        return smileyToRes;
    }

    /**
     * Builds the regular expression we use to find smileys in {@link #addSmileySpans}.
     */
    private Pattern buildPattern() {
        // Set the StringBuilder capacity with the assumption that the average

        // smiley is 3 characters long.

        StringBuilder patternString = new StringBuilder(mSmileyTexts.length * 3);

        // Build a regex that looks like (:-)|:-(|...), but escaping the smilies

        // properly so they will be interpreted literally by the regex matcher.

        patternString.append('[');
        for (String s : mSmileyTexts) {
            patternString.append(Pattern.quote(s));
            patternString.append('|');
        }
        // Replace the extra '|' with a ')'

        patternString.replace(patternString.length() - 1, patternString.length(), ")");

        return Pattern.compile(patternString.toString());
    }


    /**
     * Adds ImageSpans to a CharSequence that replace textual emoticons such
     * as :-) with a graphical version.
     *
     * @param text A CharSequence possibly containing emoticons
     * @return A CharSequence annotated with ImageSpans covering any
     * recognized emoticons.
     */
    public CharSequence addSmileySpans(CharSequence text) {
        SpannableStringBuilder builder = new SpannableStringBuilder(text);

        Matcher matcher = mPattern.matcher(text);
        while (matcher.find()) {
            int resId = mSmileyToRes.get(matcher.group());
            builder.setSpan(new ImageSpan(mContext, resId),
                            matcher.start(), matcher.end(),
                            Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        }

        return builder;
    }
}
